Deck 5: Muscle Strength

Question 1

What is the noncontractile connective tissue that surrounds the muscle?

A) Epimysium
B) Fasciculi
C) Perimysium
D) Endomysium

Answer 1

Epimysium

Question 2

Select the term that is defined by training a patient in a specific manner in order to produce a specific adaptation or training outcome.

A) Specificity
B) SAID principle
C) Overload
D) Reversibility

Answer 2

Specificity

Question 3

Actin and myosin are the two predominant proteins in which part of the muscle?

A) Perimysium
B) Fasciculi
C) Myofilaments
D) Epimysium

Answer 3

Myofilaments

Question 4

Which type of muscle contraction occurs by shortening the muscle in order to overcome an external force such as a weight?

A) Isotonic
B) Eccentric
C) Isometric
D) Concentric

Question 5

Select the most widely used and clinically relevant method of objective,reproducible strength testing.

A) Cable tensiometry
B) Dynamometry
C) Isotonic one-repetition maximum lift
D) Isokinetics

Question 6

Which of the following equations represents the definition of work?

A) Force $\times$ distance
B) Force $\times$ velocity
C) Force $\times$ perpendicular distance from the axis of rotation
D) Mass $\times$ acceleration

Question 7

Which test would a physical therapy assistant use to measure functional ability by having the patient hop on a trampoline a maximum number of times in a 30-second period?

A) One-leg hop
B) Single-leg triple hop
C) Timed single-leg hop
D) Vertical jump

Question 8

Select the guiding principle of exercise prescription that is demonstrated by applying a load to a muscle that exceeds the metabolic capacity of the muscle.

A) Specificity
B) Specific adaptations to imposed demands (SAID)
C) Overload
D) Reversibility

Question 9

How does the American Physical Therapy Association (APTA)define muscle strength?

A) The muscle force exerted by a muscle or group of muscles to overcome resistance under a specific set of circumstances
B) The capacity of a muscle or group of muscles to generate force
C) The work produced per unit of time
D) The ability to sustain force repeatedly or to generate force over a period of time

Question 10

What are the primary differences between the slow twitch (ST)muscle fibers and the fast twitch (FT)muscle fibers?

A) ST fibers are designed for endurance; FT fibers are designed for speed,strength,and power
B) ST fibers are small and have few mitochondria; FT fibers are vascular and contract at lower speeds
C) ST fibers allow for anaerobic work; FT fibers allow for aerobic work
D) ST fibers have high levels of myosin adenosine triphosphatase (ATPase); FT fibers have low levels of myosin ATPase

Question 11

A muscle's strength or tension generating capacity is determined by a number of diverse but interrelated factors.Select the best explanation of how muscle length affects strength.

A) The rate at which the motor neurons fire affects strength
B) Muscle produces the greatest strength when it is at or near the physiologic resting position at the time of contraction
C) The type of fibers (type I,type IIA,and type IIB)in the muscle determines strength
D) How the muscle fibers are aligned in relation to an imaginary line between the muscle's origin and insertion affects strength

Question 12

In the Davies Model of Exercise Progression (1985),which exercises come first?

A) Full ROM eccentric isokinetics (maximum effort)
B) Isometric/eccentric contractions,multiple angles
C) Full ROM concentric isokinetics (submaximum effort)
D) Full ROM eccentric isokinetics (submaximum effort)

Question 13

Which of the following equations represents the definition of force?

A) Force $\times$ distance/time
B) Force $\times$ velocity
C) Force $\times$ perpendicular distance from the axis of rotation
D) Mass $\times$ acceleration

Question 14

Which of the following methods for testing strength requires exercise equipment or barbells and dumbbells?

A) Cable tensiometry
B) Dynamometry
C) Isotonic one-repetition maximum lift
D) Isokinetics

Question 15

Which term describes the produced tension in a muscle with no joint movement or action taking place?

A) Isometric
B) Isotonic
C) Isokinetic
D) Eccentric

Question 16

Which term is defined as a contraction when the resistance,force,load,or tension created in a muscle changes as the joint angle changes and is illustrated by lifting free weights?

A) Isometric
B) Isotonic
C) Isokinetic
D) Eccentric

Question 17

How does the APTA define muscle power?

A) The muscle force exerted by a muscle or group of muscles to overcome resistance under a specific set of circumstances
B) The capacity of a muscle or group of muscles to generate force
C) The work produced per unit of time
D) The ability to sustain force repeatedly or to generate force over a period of time

Question 18

How does the APTA define muscle endurance?

A) The muscle force exerted by a muscle or group of muscles to overcome resistance under a specific set of circumstances
B) The capacity of a muscle or group of muscles to generate force
C) The work produced per unit of time
D) The ability to sustain force repeatedly or to generate force over a period of time

Question 19

Using the manual muscle testing grading scale,how would you record the muscle strength of a patient who was unable to provide resistance against gravity?

A) 5/5
B) 4/5
C) 3/5
D) 2/5

Question 20

Which type of muscle contraction is sometimes called the lengthening contraction?

A) Concentric
B) Eccentric
C) Isometric
D) Isotonic